1159920 has 100 divisors (see below), whose sum is σ = 4051080. Its totient is φ = 307584.

The previous prime is 1159919. The next prime is 1159967. The reversal of 1159920 is 299511.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6391 + ... + 6569.

2^1159920 is an apocalyptic number.

1159920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1159920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2025540).

1159920 is an abundant number, since it is smaller than the sum of its proper divisors (2891160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1159920 is a wasteful number, since it uses less digits than its factorization.

1159920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 1159920 is about 1076.9958217189. The cubic root of 1159920 is about 105.0693419516.

The spelling of 1159920 in words is "one million, one hundred fifty-nine thousand, nine hundred twenty".